Machine for winding coil springs



June24, 1930. R. A. KING MACHINE FORWINDING COIL SPRINGS Filed June 22, 1929 6 Sheets-Sheet INVENTOR Randall /1 {(1,77

' ATTORNEY June 24, 1930 R. A. KING MACHINE FOR WINDING COIL SPRINGS Filed June 22, 1929 6 Sheets-Sheet 2 amt 01: fiandaZl f].

. Paw 0% Junef24', 1930. R. A. KING MACHINE FOR WINDING COIL SPRINGS 6 Sheets-Sheet 3 Filed June 22 2 A I 0n.

' iNV ENTOR Handball /Y. [T i713,

ATTORNEY I I I no a June 24, 1930.

R. A. KING MACHINE FOR WINDING COIL SPRINGS Filed June 22, 1929 6 sheets-sheet -4 INVENTOR 5002060116 151. King,

ATTORNEY June 24, 1930.

R. A. KING MACHINE FOR WINDING COIL SPRINGS Filed June 22, 1929 S'Shets-Sheet 5 a9 aa I r I gmmtoz Randall 1?. H625 I 6 Sheets-Sheet e June 24, 1930. R. A. KING MACHINE FOR WINDING COIL SPRINGS F iled June 22, 1929 V w m A M 6 G. a a fl a M .fi.

JJz y. Z1.

Q O O .w? .W 1 in a 3,. 3 5 F & J a 1v w m m 7 mm m provide a 85 wherein TF'gmre' i I v p the plane indicated' bythe'li i Fig.

Patented June '24, 1930 DAL A-Y'KING, Bfid coLoBADo' MACHINE roawrnmne' con;- srgm f Application fiidmm,

5 "The qbjet is genrallyfto provide amachine constructed so as to read ily wind 'springsfgtrom various sizes of wire either in' right hand or left-hand spirals; to l fonstruc'tion inwhich the spring is formed in and advancedthrough' athimble, rather thanon' a spindle; to provide a winding machine equipped with a feed ng sectioninjwhich a constantand uniform ten- 1'0 sion ismaintained on the;wire; to providea series of:guideslthroughwhich the wire is passed inthe feedings'ection andwbetween which it"is subjected to the action of pressure rolls for. maintaining the tension ;(to provide .15 a machine of this nature;equipped with a plurality of dies formed to I carryeach s ze of wire within the range of the machlne and to directz-it either nto a right-handor left? hand spiral, thedi'es being selectively mountable on the 'foriii'ing' section of the machine;

tolprovidefa; swinging plate on which the dies are mounted; so that they may be swung toward'or from the coilreceiving thimble; to, provide a construction that provides for Y the relative'reversal of rotation vbetween the feeding and forming sections and to provide a machlne of this nature which is re duced to the simplest constructlon mechan cally which makes for its cheap manufacture I and 'lowmark'eting cost.

With this'object inview the invention consists; a construction.and 'combination of parts of which a preferred embodiment is i1- lustrated in the accompanying draw ngs,

Figure 1: is aifplan viewof the invention. showing in section, the cover member of the I working parts. I i Y I j FiguresQ and 3 are sectional views onthe 140 plane indicated the lines 2-2 and respectively f Figure 1. a

18;?! transverse sectionalyiew .on

ure l.

' Figure" 5 Ia detailsectiOnalVieW illustrat- @Figure 6 ,'s'a detallview'partlyin section partly in elevation showing the 1 geared 1929 Serial m; 372,946. I

connections "between the feeding and wind: ing mechanism when the machine is arr'anged for the win ding of right hand springsfz Fig're 7: an end lele vational view of one of the y'vireguides. a 7 'FiguresS to 11 inclusive are longitudinal sectional viewsillustratingthe spring 'receiving thimblesi for various sizes of springs and diameters-of wire, a T" f I Figures12 to "19 ,-inclusive illustrateQinj pairsthe front, and edge elevational views of. V thedies employed for right-hand springs of different sizes of wire. r I y Figures2O to 25 illustrate inpairsthefront and edge .jelevations -of dies for v-lett-hand' springs of different sizes'of wire. In the production of oil springs with the machine herein disclosed,.the wire strand is led from a" coil carried on an; appropriate support and advanced throughthe'initia'l, intermediate and terminal guides 10, ll and 12bet ween whichit is subjected tothe action I of the pressurerollers14E vand15 these'roll ers being jarran'ged in pairs of which-the upper pair are in peripheral contact-with J the lower pair. From the terminal-guide, the wirezpasses tothe die 1'6 which is removably mounted onthe. swinging die plate 17 frorn the face of which project pins '18 entering sockets 1 9 inthe die In the use of the machine, a separate die is employed for each size wi-re and-that die'used for a. left-' hand spring di-fiers from the corresponding di'ejfor, a right-hand spring in theyloc'ation of its wire guide groove 20 which-is et generr ally a'rcuate :form terminating in the: periplreryof a' circle whose outer diameter 'corre sponds to the bore of the" hardened bushing,

hollow spindle 28 rotatably .-mounted :in v the I ball bearings 24 andj25: ,The; 'spindleli'qis I flanged. as indicated at '26 at the-thimble ree ceivi'ng end and behind said flangeisprovid'e d 3, 1 V I 95 a f a with'a" thrust bear n 27. The'thimble is re? movabl y. mountedin the spindletbeing mere? l-y slid into the flange end thereof but in order Q a that itmay be positively driveniby the spindle when the latter 'isirotated the thimble -is provided with a thrust flange-:28 provided 0 V wit rflange26r H i The spindle carries a gear '30 by means of which it is driven through the instrumental- I ityof asilent chain'belt'31 which is trained over arpi'nion 32 carried by the shaft of a redowels 29 which seat in sockets in the versible motor 33, the motorbeing'mounted on a shelf'34su'pported from the legs 35 by 1 V which the bed-plate'36 is carried, the latter supporting the whole mechanism with theex- 'ception of the driving motor which is; disposed below it. l

The wire guide groove 20ais of progressively reduced depth from its intake to its discharge end, the "discharge end b'eing flush with the die where'the wire'enters thethimble and the intake end being of a depth equal to the" di'ameter' of'the wire. The arcuate formation-of the 'grooveflresults, as the wire is forced through the latter, finthe gradual bending ofthe wire untillit begins a circular curve .of-the' convolution of'the spring to be 3 formed, when the wire enters "the thimble in 'Wl1lCl1" successive "COHVOlUtlOIlS are forced.

. Theswinging die plate 17 has a hinge coni nection37 with a bracket plate 38,'the latter supporting the discharge end of the terminal guide 12. On its bottom and at the free edge it is formed'with a bearing foot 39 traversing latter maybe swung onfits hinged connection from a -position directly in front of'the thimble end of the spindleto a position at 7 right angles-thereto, the'latte'r position being such Easwill permit a change of dies and the former position that in which the feeding of the wire into the thimbletakes place. 4 The arcuate rib supportsthe free edge of-thedie plate throughoutits swinging movement. In

the feeding position ofthe die supporting plate, the screw 42 is advancedtoward the thiin'ble end of the spindle, when its terminal passes-through the clearance opening 44 of atter closefltothe thimble resulting in forc 'the'die plate, bearinguponthe dieto hold the v ing'the wire into the thimble as it is forced through the forminggroove of the die. The

adjustmentjof the screw to properly position I the die is"maintainedlwitha lock nut 45 car- Tiedon the screw and bearing against 1 the outer face ofthe bracket 42. v

' In the feeding sectionof the machine, the

rollers 15'are carried on shafts 46'mou'nted in hearings on afbed 47, the latter being spaced above but secured to the bed plate 36 by cap screws 48-. The rollers 15 are rotated by gears 49carried on the shafts 46 and meshing with th inion 50 carried by a shaft'51 whichis roller frame 54, the posts being end of the spindle.-

journalled on the bed47 and whichcarriesa gear 52 of relatively large diameter actua-ted'from the spindle 23 in a manner hereinafter appearing. 1 At the four corners of the bed 47 are disposed the posts 53 whichse'rve to position a roller frame 54 by which the rollers 14 arecar-ried, the latter havingshafts 55 journall'cd in the roller frame." Since the wire being fed passes between the rollers 14 and 15 and since it is necessary for both r0114 7 sure positive feeding action,the rollers 14 are forced towards the rollers 15 by spring presersto inake firm contact with the wire to ensure, eachpost 53 being p'rovided witha coinpressionspiral spring 56 surrounding the post and bearing upon the upper face of the provided with inverted flanged washers 57,bearingjupon the V upper ends of the springs 56' and retained by nuts 58 threadinglv engaged with the posts. The adjustment of the nuts serves, within limited range, to determine f the' pre'ssure to be exerted by the springs."

The feed rollers anjd' 15 are each pro- 'vided with a series ofcirc'umferential grooves 59,1e ach groove correspond ng to a particular sizeof wire, so that in the varyingsizes withi in therange ofthemachine, each maybe disposed in its appropriate groove "in the feed roller; The three guides'lO, 11 and 12 m provided with'guide holes60, these holes cor responding to the f'diiferent sizes of wire to be used, the holesdn'the guides registering with the corresponding grooves in thegfeed rollers. The guides are fo rined with' wedge shapedends' adjacent the rollers todispose the guide holes as far inbetween the rollers as possible. I i I The, guides: are

sides of the guides. e

The guide 12 is jointly supported the bracket plate and the'bracket pl-ate a corresponding 7 employed in connection with the latter, and

the guide holes at their discharge end register carried on bracket plates: carried by thebed 47, these bracket plates having pins 62 entering holes'forined on the pin and holefsupport being with the entrance ends of the guide grooves inv the dies,-the die fora particular size wire to pos tion ts being of such a thickness as guide groove opposite the corresponding guide hole or opening in the guide12; I

i Motion is coinln'unicatedto the feed rollers 4 14 and 15 b the relativeb' lar 'eb'ear 52 r V J D b v as heretofore described and this receive-sits motion fr 111 the spindle 23, o1rwhich iscarrleda gear 63 meslnng with an dler64wh1ch inturn meshes with'a double idler65 which mturn meshes withthe gear 52.

64 65 .7 are mounted "on studs andv are removably supported on'a bracket 68, the latter being secured to the bed plate 48 by bolts 69 and the foot or base 'TOof the V v 7 71 through which the bolts pass, so. thatthe bracket may bracket being formed with slots jThe idlers 66 and 67 1 igrea-ee headjusted toiproprly inen t ozE-the-two'idlers'64; andf65, the feed rollersand spindle turn; in relatively oppo;

1 both with the gears52 and'6-3." With theone same direction, which isIithe condition; when right han-d springs are being wound r site directions which m'ust be the condition when left-hand "springs 3 are being wound;

' When right-hand springs g are to be wound,

the two idlers 64' aind65' are replaced with an equivalent of the-latter whiclris thenmount ed on thestud G 'Z'and adjusted to be in mesh idler the feed rollers and spindle turnbinthe ;E Theidlers "'64 and 65* are replaced-with v-i'dlers of different "ratios tojvary the relative speeds'of the' spindle and feed rollers, since these relative speeds inust be suhj ect to change when working with ,dl-iierent siZes' ofwire.

In actual operatiomthe feed rollers must always turn in a directionto feed the wire from a the guide 10 through the guide 12 whichcalls niachinefi's arranged for thefwin ingof *sp'rmg's having their spirals turned left-hand- 40 e'dly'; Both the idlergearst l and 65 are.

for left-handed rotation of thegear'52 which 'isitsi directionjof rotation irrespective of whether right-for left-hand springs are hemg formed, The spindle; however',must1.ro-

tate right-handedly orleft-ha'ndedly, depending onthe character of the spring, and its change of directionis erreaeab 'a reversal in the direction of rotation of thedrivingmotor. Theidler gears, therefore; provide for maintaining the desired left-handedrotation (o 'f'the gea'r 52 irrespectiveoi whether the spindle rotated right handedly or lefthandedly, as well as means for-changing the relative s'peeds of thespindleand feed rollers.

I In the assembly views in the drawings; the

therefore employed and the motorisconnect- GCl'tO rotate right-handedly with the point of considered at the pinion end of the moto'r'; The spindle", therefore, rotates righthandedly and a left-h a'iidforming die 16 is "mounted on the die plate. 'Thewire is passed through the guides 10,'1:1*and12;and between V physical change."

the rollers'14andf15, being positioned in the proper holes inthe gui'des and grooves in the rollers accord ng to its size/ The gear 1 v 52 rotating leftshan'dedly, the rollers 15"r0 tate right-'handedlyland the rollers 14 left handedly and the wire'iis forced through the guides and into theiormin'g groove 2-0 ofth'e'dieby which the coil forming operation is startedan'd-then' into ithe thinihle 22, the successive coi'lsbeing laid in the thimble and the, completed spring passing through the same and o'utthe remoteend of the spindle. fi-The coni'p' l'eteequipment comprises a plurality of thimbles of wliich thereis one for each size of wire f If the springs't o be formed are to be wound right handedly, the driving motoris reversed to turn left-'handedly,thus rotating the spinthe with their respective gears. \Vith the "employdle 23 leit-handedlv5 the" idler gears v having"been-replaced with a single -gea'r connecting the gear's 68 and 52. The feed ro l ler's'thus rotate as before; so 'that thewire is fediin the same direction. Thea-guide 12, however, is replaced wltha guide 12 di fFer' .ent fromthe guid'ejl-Qin that it is so shaped thatiitsfdischarge end lies in a lowerrplane" than: that of the guide 12, which provides for the discharge of the wireinto the forming groove 20 of die 16 which has been mounted onthe die p'late. The forming gro'YeZO} is similar to the i'orming'groove 20in the die 16 butferrmr ed reversely to the latter,

so thatit forms a right-hand turn in forming' the successive conv'olutions' ofthe spring; 'lhe equipment comprlses a pair of rrghtf and-left-handdies for each size'of wirediffering only in that their forming grooves are respectively reversel'y disposed and the several sets of dies. varyin' thickness so that,

when mounted on the die plate theirformm 'QQ S ay lffiglster with theyproper 1 Openings or holeg gulde,

In cases where it isdesiredto; wind double springs whereone isrom-pletely "inclosedwithin the other, the smaller spring is'first,

wound as described above." The l'arger or outer spring is then wound over it and in the second wlnding operation, a die such as that illustrated inFigures 24: and 251s used This dieis formed with a taper hole 20* clear 7 throughit, the smaller endof the hole being of the diameter of the smaller or inner spring andthe guide groove 20 terminating in: the periphery of the smaller end otthis hole. As the wire for the largeror outer spring is, being coiled', the smaller spring is being fed through the hole 20,' so that the outer spring is rolled upon it. The tapering shape 0i the 4 'holeQO" provides an enlarged entrance end for the spring coil being fed through it and thepositionof the feed screw above? the center of the spindle permits it bearing upon the die adjacent the upper edge oiithe clear ance opening 20 I In the winding operation,. the' wire being operated up-on undergoes a Great heat. is generated due to. the friction in the Y also to the friction in the forming die and spindle, but this condition provides for a tempering stepby 7 It will be noted 'th'zit in 'sphn ror an oil ing operation, thelwire is never subjected to tensional strain norto torsion, but always to a compressive strain so that there; is. a compacting rather than a separation of'its molecular} structure, as would be the case" were it wound' on the exterior, of aspindle or arbor when a tensile strain would be present. The

* heat generated reduces the initial Etemper'of the wire,loutthe oil giyes'it the proper temper in the coil forming operation and experience hasshown: that wireQWhich in the first in stance wasjeasily broken, was finally delivr' ered by thema-chine in a formedspring of. such tough and tenacious character as to successfully resist unusual torsional strains in the direc'tion of or against its spirals and of sucha resilient quality'as to provide for the resumption of normal shape after unusual v bends.

vBy reason of themanner in which it is Wound, the material of the strand constitute ing the formeds'pring is subjected to comdle,

pression on that part which constitutesthe nterior of the completed spring,]with none,

or but slight compression of thematerial at the outer surface of-the finished spring;

1 The invent on having been described what is clai ned'as new and useful is: V 7

1. A coil spring forming machine comprismeans for advancing spring wire towards the spindle, and a ,die swingingly mounted in front of thespindle and provided with a forming grooveiii communication atone end with'the feeding means and at the other end with the spindle. H V M I 2. A coil spring forming machine comprising a spring receiving spindle, wire feeding means for advancing-spring wire towards the spindle, and a die positioned in front of the spindle and provided w th a forming groove n communication at one endwith the feeding: means and atthe other end with the spinthe ndiebeingcmovable toward and away from the receivingend of-the spindle. 3. A coil springforming machine comprising a spring receiving spindle, wire feeding meansfor advanc ng spring wire towards the l j in communication at one end with the'feeding spindle, and a die, positioned in front of the spindle andprovided with a forminggroove in communication at one end with the feed,- ing means and at the other end with the spindle, the die being inovableltoi 'ard and away .iromvthereceivingfend of thespindle, and 'means for holding the d e in co receivingen-d of the spindle."

ntact with the 4. A coil spring forming machine comprisng a spring receiving spindle, wirefeed n'g ,meansfor advancing spring wire towards the spindle, and-a die positioned infront of the spindleand provided with a'forrninggroove means and at the other end with thespindle,

the die being movable toward and away from the receiving end of the spindle, and ad ustfeeding means and the o inga spring receiving spindle, wire feeding;

able means for holdingt he'die contact with the receiving end of the spindle.

5. A coilspring forming machine comprise ing a springreceiving spindle, wire feeding means for advancingjspring wire towards the spindle, means for rotating} the spindle in either direction, die holding meaiis, jandfdies for SBlQCtIVQ mounting on said die holding means and respectively; provic'ledwith 1 6: versely' ClISPOS ECl coil forming, grooves; of

which one end is in communicationwiththe. 1

nicationwith the'spindleg V V -vs' 6. A coil spring forming machine compr sing a spring receiving spindle, :wire feeding means for advancingspring WIIG' towards the spindle,means for rotating the spindle in either direction, die holding means, anddies for-selective mounting on said die holding 11169 11811116, respectively provided with i re; 7

th ir nd in L 'omi versel .dis aosed coil formin f rooves 1 of 1;

which one endis in communication with the feeding means 'andtheotherend in communication with the spindle, the dieholdingmeans j consisting of a plate movable toward and away from the receiving end of thespindle.

7. A coil spring forming machine comprising a spring receiving. spindle, wire feeding ii'ieans foradvancing spring wire towards the spindle, means for rotating the. spindle n eitherdii'ection, die holding means, and dies consisting of a pl atelm ovable toward fand away from the; receiving end of the, spindle, said plate having a hinge mounting tolone side of the spindle, and apressure screw aX-ially aligned Witlijth spindle and passing through an opening in the. plate to bear upon the die and hold it in contact with the spindle. 8. A coil spring forming machine comprising aspringreceiving spindle, means for selectively rotating the spindle in 'either direction, wire feeding means. operat vely connected with the spindle for advancingspring' wire towards the same irrespective of the di 1 rection of rotation of thespindle, c lie mount ing means, and dies provided respectively with reversely disposed coil forming grooves,

said dies being selectively attachable to said mounting when the grooves are in com nunication at one end with the feeding ineansand at the other end withthe' spindle;

9. A coil spring forming machine compris ing a spring receiving'spindle, means for se l'ectively rotating the spindle in either direc, tion, wire feeding means operatively connect ed with the spindle for advancing spring wi re a towards the'same irrespective of the direction of rotation of the spindle,;die mounting means, and dies provided respectivelywith" rection, wire feeding means operatively con;

nected with the spindle for advancing spring wire towards the same irrespective of the-dif- TECUQH otrotationot thespindle, the mountwith reversely disposed coil forming, grooves,

said dies being selectively attachableito said mounting whentheirfigroove's areln co1n-.

munication atone end with thefeeding means and at theother end with the spindle, the receiving end of the soindlerbein rovided with a coil receiving Ithimble, and the die mounting means-consist ng of a platehaving ahinge-mounting to one side of the spindle to permitit being swung toward and away fro the spindle for change of. d1es;\- 1

1 11-.'A' coilispring forming machine comprising 'a spring receiving spindle, means for selectivelyrotatingthe spindle in either direction, wire feeding means operatlvely connected with the spindle for "advancing spring wire towards the same irrespective of the direction of rotation of the spindle, die mounting means, and dies provided respec; tively with reversely disposed coil forming grooves, said dies-being selectively attachable to said mounting-when their grooves are in communication at one end with the feeding means and at the other-end with the spindle,

the receiving end of the, spindle beingprovided with a coil receiving thimble, and the die mounting means consisting of aplate havlng a hinge mountlng to one side of the spindle to permit 1ts being swung toward and away from the spindle for change of dies, and means for holding the die in contact with the thimble in one position of the die holding plate. I 12.'A coil spring forming machine com prising a spring receiving spindle, means for selectively rotating the spindle in either direction, wirefeeding means operatively connected with the spindle for advancing'spring wire towards the same irrespective of the direction of rotation of the spindle, die mounting means, and dies provided respectively with reversely disposed coil forming grooves, said dies being selectively attachable to said mounting when their grooves are in communication at one end with the -feeding means and at the other end with the spindle, the receiving end of the spindle'being provided with a coil receiving thimble, andv the die, mounting means consisting of a plate having. a 'hlnge mounting to one slde of the spindle prisinga spring-receiving spindle, means for selectively rotating the spindle inieither direction, wire feeding means operatively connected with the spindle. for advancing ing means, and dies provided respectively with the teeding means and at the other to permit it "being swung toward and away from the spindle for change of dies, and' meansfo-r holding the. die in contact wit-lithe thiinblefin one position of the/die holding plate, said means comprising: an adjusting screwamally aligned with the spmdleand passing through a .clearanceopening in the" holding-plate to bear upon the die. i

13. A coil spr ng forming machine coms'pring wiretowards thesame irrespective ot/the direction otrotfation of the spindle, die mounting means, ftll-ClfillGS provided respectively withreversely disposed coil forming grooves, said, dies helng I selectlvely attachable to said mounting when their arefin communication atone end end with the spindle, thereceiving end of the spindle being provided with a coil receiving thimble, and the die mounting means consisti ngcof a plate havinga hinge mounting grooves v at 'oneside of the spindle tofpermit it being swung toward and away from the spindle for change of dies, and'means'tor holding the die in contact Wlhillllfi thnnble 1n one posit on of the d e holding plate, said means comp 'ising an vadjusting; screw axially.

a clearance.- opening in the. holding plate to alignedwith the spindle and passing through a bean-upon the die,' and-'a bracket-with which j said screw is threadingly engaged, the bracket being formed withabase-plate andanarcuate rib concentric withthe hinge mounting of theholding platepthe lat-ter' 'having ai -toot bearing on the upper face of said rib.

i l. --A coil-spring iorming machine comprising-ya springreceiving spindle, wirefeeding means for advancing spring wire towards the spindle and COlnPliSlllgSPfifiGCl stationary wire gnidesand intervening feed rollers,- and a die positioned .iniront of the spindle andprovided w-ith a f-ormin-g groove in communica-t 1138,13 oneend with the spindle and k at the other end with the terminal stationary guideof the feeding rneansl .15. A coil spring formingrmachinecom-f )IlSHl a sinn receivin s indle wlre feed-- 1 .b v 23 h 7 ing means for advancing spring wire. to wards the spindle and compris ng spacedstationary wire guides and intervening teed rollers,"an d a diepositioned in front of the spindle and provided with a. forming groove in communication at one end with the spindle and. atthe other end withfthe terminal sta-' tionary guide offthe feeding means, the feeding rollers being arrangedin pairs of which one pair is above and the otherbelow thestationary guides. f.

v1 6..i-ipcoil springtorming machine comprising a spring receiving spindle, wire teeding means for advancing. spring wire towards i I thespindle and comprising spaced stationary wire guides andintervening feed rollers, and a die positioned in front of the spindle andprovided with a forming groovein com inunication at one end with the spindle and p at the other end with the terminal stationary guide of the tee'cl1ng'1neans,;tl1e teed rollers being a'rrangedin pairs'ot which 'one'pa-ir r p is aboveand the other below the stationary guides, one pair 'ofsaid rollers beingyieldingly inipelled toward the other pair;

' l7. A coil spring forming machine comirisin )111'1 IECGIVIILO s indle Wire teed- O D b 3 mg means for advancing spring Wire towardsthe spindle and comprising spaced'stationary'wire' guides and intervening feed roll ers, and a die positioned'in front of the spin dle andprovided with a forminlg'grooveln communication at one end with the spindle and at the other end with: the terminal. stationary guide of the feeding means, the feed ing rollersbeing 'arranged in pa rs of which one pair s above and'the other below the stationary guides, the upper pairof said rollers being spring impelled toward-the other pair and provided with means for adjusti1ig the presSureoiaid springs.

-18. A coil springlr ii'orming machine com prising a spring'receiving spindle, Wire feeding means *for advancing spring wire to wards the spindle and comprising spaced stationary wire guidesfand interveningfeed rollers, and a die positioned in front of the spindle and providedgwith a forming groove 1n cornmunication'at oneend with the spin ,dle and at the other endqviththeternnnal stationary guide of the feeding'means, the

" feeding rollers being arranged in pairso'f which one pair is above and the other below the'stationary guides, said stationary guides being provided with pluralitles'of holes corresponding to. difierent sizes of wire andthe feed rollers being formed with peripheral grooves of-corresp'onding sizes'to and in reglstration-wlth the holes 1n the guides, the the having its forminggroove correspondingin size to one guides. 1 v p 7 i a 19. A coil spring forming machine com prising a spring receiving spindle, wire feeding means for advancing spring wire towards therspmdle and comprising spaced 'stationary wire guidesand intervening feed rollers, and a d e posit oned ln'fl'ont of the spindle and provided with a forming groove 1n communication'at one endwith' the spindle and .at the other en'dwith the terminal stationary gu de ot-the feeding means, the feeding rollers being arranged'in pairs of which one pair 1S above and the other below the stationary guides, said stationary guides bemg provided With plu'ralities of holes corresponding to 7 different sizes of wireandthe feed rollers be-' ing formed with peripheral grooves of corresp'onchng slzes to and 1n registration with ture;

ofthe holes in said stationary said die holding means and each provided, with a forming groove 1n communlcation at one end'with the spindle the form ng grooves l in different dies being of diiierent sizes with those 1n some reversely dlsposed with respect to those in the others wire feeding means 6 r.

for advancing springlwire towards the spingdle and comprising spaced stationaryguides with guide holes'correspondingm size to the grooves in the different dies, the; guide holes inthe terminal guide communicating with the forming-grooves in the" respective dies, feed rollers arranged in pairs respectively above and below the stationary guides and. disposed between adJacent guldes, and operativeconnections between the spindle and feed rollers to permit continuous rotation of the latter in one direction and rotation of the former in either direction. I

In-testimony whereof he affixes his Sign,

- RANDALL-A. KING. 

